Correct Answer: A

Rationale: Chemotherapy drugs are often vesicants, meaning they can cause severe tissue damage if they leak (extravasate) outside of the vein. When chemotherapy is administered through a peripheral IV line, it is crucial for the nurse to frequently assess the IV site for signs of complications such as redness, swelling, or pain, which could indicate extravasation. Checking for blood return ensures the IV catheter is still in the vein and functioning properly. Preventing tissue damage from chemotherapy extravasation is a top priority, and frequent monitoring helps ensure the infusion is proceeding safely.

Correct Answer: B

Rationale: Contact inhibition is a regulatory mechanism that prevents cells from proliferating once they reach a certain density. Normally, when cells grow and touch each other (such as in a monolayer), they stop dividing, maintaining tissue integrity and structure. When contact inhibition is lacking, as in many cancerous cells, cells continue to grow and divide uncontrollably, leading to tumor formation. This loss of regulation is a hallmark of cancerous growth.

Correct Answer: C

Rationale: Primary prevention involves actions taken to reduce the risk of developing cancer by preventing exposure to known risk factors or promoting healthy behaviors. Teaching patients to wear sunscreen is an example of primary prevention because it aims to reduce the risk of skin cancer by minimizing exposure to harmful ultraviolet (UV) radiation from the sun. Encouraging protective measures such as wearing sunscreen, avoiding tanning beds, and wearing protective clothing are all steps to prevent skin cancer before it develops.

Correct Answer: A

Rationale: Chemotherapy drugs are often vesicants, meaning they can cause severe tissue damage if they leak (extravasate) outside of the vein. When chemotherapy is administered through a peripheral IV line, it is crucial for the nurse to frequently assess the IV site for signs of complications such as redness, swelling, or pain, which could indicate extravasation. Checking for blood return ensures the IV catheter is still in the vein and functioning properly. Preventing tissue damage from chemotherapy extravasation is a top priority, and frequent monitoring helps ensure the infusion is proceeding safely.

Correct Answer: B

Rationale: The best time to perform a testicular self-examination (TSE) is after a warm shower or bath. The heat from the water relaxes the scrotal skin, making it easier to feel any abnormalities, lumps, or changes in the testicles. This relaxation allows for a more thorough and accurate examination.